RJ45?
RJ45 stands for "Registered Jack 45," and it is
a standardized physical network interface
commonly used for connecting computer
networks and telecommunications equipment.
The RJ45 connector is widely recognized for
its application in Ethernet networking.
RJ-45 is an 8-pin connection used for Ethernet
network adapters.This connector resembles
the RJ-11 or 6-pin connector used with
telephones in the United States, but they're completely different. The
picture is of an RJ-45 connector separated from the cable.
Key Features
1. Connector Type
● The RJ45 connector is an 8P8C (8 Position 8 Contact) modular
connector.
● It features eight pins, which correspond to the eight wires within
the cable.
2. Cabling
● Typically used with twisted pair cables, such as Cat5, Cat5e,
Cat6, and Cat6a, each offering different performance levels in
terms of speed and bandwidth.
● The most common form of cabling is Unshielded Twisted Pair
(UTP), though Shielded Twisted Pair (STP) is also used in
environments with high electromagnetic interference.
3. Usage
● Predominantly used in Ethernet networks, enabling the
connection of various devices like computers, routers, switches,
and network interface cards (NICs).
● It can also be used for telecommunication purposes, though
this is less common with the advent of wireless technologies.
4. Pin Configuration
● The standard pinout for Ethernet connections follows either the
T568A or T568B standard.
● The difference between T568A and T568B is the order of the
pin assignments but both achieve the same electrical
performance.
● Both standards ensure the proper pairing for differential
signaling, which helps in reducing crosstalk and
electromagnetic interference.
Technical Specification
1. Physical Characteristics
● Rectangular in shape with a clip on one side to secure the
connection.
● Dimensions: Approximately 21.5 mm in length, 11.7 mm in
width, and 8 mm in height.
2. Electrical Characteristics
● Supports a variety of networking speeds
i. Cat5: Up to 100 Mbps (Fast Ethernet)
ii. Cat5e: Up to 1 Gbps (Gigabit Ethernet)
iii. Cat6: Up to 10 Gbps (Gigabit Ethernet with higher
frequency support)
iv. Cat6a: Enhanced performance for 10 Gbps over longer
distances
3. Compatibility
● Backward compatible with previous Ethernet standards,
allowing for versatile and flexible networking setups.
● Often used with Power over Ethernet (PoE) technology, which
enables the transfer of electrical power along with data on the
same cable.
Practical Applications
1. Home Networking
● Connecting home routers to computers, gaming consoles,
smart TVs, and other devices to ensure reliable and high-speed
internet access.
2. Business and Enterprise Networks
● Establishing local area networks (LANs) to connect computers,
printers, and servers within office environments.
● Essential for creating secure and efficient wired networks,
especially in data centers and server farms.
3. Telecommunications
● Although less common, RJ45 can be used for telephone line
connections, particularly in structured cabling systems that
integrate both voice and data.
Installation and Maintenance
1. Termination
● Requires proper crimping tools to attach the RJ45 connector to
the cable.
● Ensuring the correct order of wires (following T568A or T568B)
is crucial for the network to function properly.
2. Testing
● Cable testers are used to verify the integrity and performance of
the connections.
● Regular maintenance and testing help prevent network
downtime and connectivity issues
RJ45 Manufacturer
Several manufacturers produce RJ45 connectors, catering to the needs of
different industries including networking, telecommunications, and
consumer electronics. Here are some of the notable manufacturers:
1. AMP (TE Connectivity)
● Overview: TE Connectivity is a global technology leader in
connectivity and sensor solutions. AMP, one of their brands, is
well-known for its high-quality RJ45 connectors.
● Products: Offers a wide range of RJ45 connectors, including
shielded and unshielded versions, suitable for various
networking applications.
● Website: TE Connectivity
2. Belkin
● Overview: Belkin is a leading manufacturer of networking
products, known for its consumer and enterprise solutions.
● Products: Provides reliable RJ45 connectors and patch cables,
often used in home and office networking setups.
● Website: Belkin
3. Panduit
● Overview: Panduit is a global provider of innovative electrical
and network infrastructure solutions.
● Products: Offers a comprehensive range of RJ45 connectors,
including modular jacks and plugs designed for high-
performance networking.
● Website: Panduit
4. Leviton
● Overview: Leviton is a leading manufacturer of electrical wiring
devices, network infrastructure, and connectivity solutions.
● Products: Produces a variety of RJ45 connectors suitable for
both residential and commercial applications.
● Website: Leviton
5. CommScope
● Overview: CommScope is a global leader in infrastructure
solutions for communications networks.
● Products: Offers high-quality RJ45 connectors as part of its
extensive product line for structured cabling systems.
● Website: CommScope
6. Hubbell
● Overview: Hubbell is a prominent manufacturer of electrical and
electronic products for a wide range of applications.
● Products: Provides a selection of RJ45 connectors known for
their durability and performance in various environments.
● Website: Hubbell
7. 3M
● Overview: 3M is a diversified technology company with a broad
portfolio of products, including those for networking and
telecommunications.
● Products: Offers reliable RJ45 connectors that are widely used
in networking installations
● Website: 3M
8. Phoenix Contact
● Overview: Phoenix Contact is a global leader in electrical
engineering and automation solutions.
● Products: Provides a variety of RJ45 connectors designed for
industrial and commercial networking applications.
● Website: Phoenix Contact
9. Molex
● Overview: Molex is a leading supplier of connectors and
interconnect components.
● Products: Known for their extensive range of RJ45 connectors,
which are used in various networking environments.
● Website: Molex
10. Siemon
● Overview: Siemon is a leading global manufacturer of IT
infrastructure solutions.
● Products: Offers high-performance RJ45 connectors and
modular plug products suitable for advanced networking
applications.
● Website: Siemon
These manufacturers provide RJ45 connectors that cater to different
needs, from simple home networking to complex enterprise-level
installations. Their products vary in features such as shielding,
performance grades, and durability, ensuring a suitable option for virtually
any application.
